September 8, 20187 yr Anyone in here tried playing around with different disk block sizes to see how performance is affected? Since a while back I'm using XP11 as my main flight sim and this with Ortho4XP photo scenery covering the major part of Europe. I have a dedicated a 10 TB 7200 RPM HDD for the photo scenery which takes up about 6 TB of the drive. One thing I've noticed is how some stuttering occurs when new photo scenery is read as you fly along. For this reason I started thinking that maybe increasing the block size from the standard 4096 bytes to something bigger, maybe even all the way up to 2MB, might increase performance. This based on the fact that the average file size for this drive is 4.3 MB where 4096 bytes blocks doesn't seem very efficient. What do you guys think?
September 8, 20187 yr I think if you can put it on a SSD you'll be better off hehe. I also get the stutters I've got mine on my 1TB 7200 rpm hdd. | My Liveries | FAA ZMP | PPL ASEL | | Windows 11 | MSI Z690 Tomahawk | 12700K 4.7GHz | MSI RTX 4080 | 64GB 6000 MHz DDR5 | 500GB Samsung 860 Evo SSD | 2x 2TB Samsung 970 Evo M.2 | EVGA 850W Gold | Corsair 5000X | HP G2 (VR) / LG 27" 1440p |
September 8, 20187 yr I would guess that XP does lookahead scenery buffering much like the ESP-based platforms do, which means the scenery elements should already be loaded in RAM when time comes to render them in a frame. If so, that would suggest the stutters are more likely related to pushing the large bitmaps to the video card from system memory, making modest changes in HDD throughput pretty much irrelevant. Fast RAM (system and GPU) and a high-bandwidth PCIe bus would probably be the place to look for improvements there. Regards Bob Scott | President and CEO, AVSIM Inc ATP Gulfstream II-III-IV-V Sys1 (MSFS20+24/XPlane12+11): AMD 9800X3D, water 2x240mm, MSI MPG X670E Carbon, 64GB GSkill 6000/30, nVidia RTX4090FE Alienware AW3821DW 38" 21:9 GSync, 2x4TB Crucial T705 PCIe5 + 2x2TB Samsung 990 SSD, EVGA 1000P2 PSU, 12.9" iPad Pro Thrustmaster TCA Boeing Yoke, TCA Airbus Sidestick, Twin TCA Airbus Throttle quads, PFC Cirrus Pedals, Coolermaster HAF932 case Sys2 (P3Dv5/v4): i9-13900KS, water 2x360mm, ASUS Z790 Hero, 32GB GSkill 7800MHz CAS36, ASUS RTX4090 Samsung 55" JS8500 4K TV@60Hz, 3x 2TB WD SN850X 1x 4TB Crucial P3 M.2 NVME SSD, EVGA 1600T2 PSU Fiber link to Yamaha RX-V467 Home Theater Receiver, Polk/Klipsch 6" bookshelf speakers, Polk 12" subwoofer, 12.9" iPad Pro PFC yoke/throttle quad/pedals with custom Hall sensor retrofit, Thermaltake View 71 case, Stream Deck XL button box Sys3 (DCS/P3Dv4/ATS/ETS): AMD 7800X3D, MSI MPG X870E Carbon, Noctua NH-D15S, 64GB GSkill 6000/30, EVGA RTX3090 Alienware AW3420DW 34" 21:9 GSync, Corsair HX1000i PSU, 4TB Crucial T705 PCIe5 + 2TB Samsung 970Evo Plus, TM TCA Officer Pack, Saitek combat pedals, TM Warthog, TM RS300 FF wheel/pedals, Coolermaster HAF XB case
September 8, 20187 yr Author 3 hours ago, ryanbatcund said: I think if you can put it on a SSD you'll be better off hehe. I also get the stutters I've got mine on my 1TB 7200 rpm hdd. Getting an SSD (or a couple of SSDs) to store some 6 TB data might end up being a bit too expensive for my taste 😄 2 hours ago, w6kd said: I would guess that XP does lookahead scenery buffering much like the ESP-based platforms do, which means the scenery elements should already be loaded in RAM when time comes to render them in a frame. If so, that would suggest the stutters are more likely related to pushing the large bitmaps to the video card from system memory, making modest changes in HDD throughput pretty much irrelevant. Fast RAM (system and GPU) and a high-bandwidth PCIe bus would probably be the place to look for improvements there. Regards What you say is interesting but I'm not sure that is the case here. Reason being I see the disk activity light glowing at the same time I experience the stuttering. Looking at the other parts of my system, I don't have a top of the line system but still fairly competent - a 6700K @ 4.5 GHz, 16 GB 3000 MHz DDR4 RAM and a 1080Ti. My system as well as XP partitions reside on a Samsung 950 Pro SSD.
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